| Touchground Limited | Professional & scientific | 2022 |
| Touchure Limited | Information & communication | 2021 |
| Tour & Store Ltd | Transport & logistics | 2019 |
| Tourdan Commercial Limited | Real estate | 2025 |
| Tourdan Limited | Real estate | 2019 |
| Tower Roofers Limited | Construction | 2002 |
| Tower Roofing Limited | Construction | 1994 |
| Towler Catering Limited | Hospitality | 2026 |
| Towler Holdings Limited | Real estate | 2026 |
| Towler Property Group Limited | Real estate | 2024 |
| Town Square Group Ltd | Administrative & support | 2018 |
| Town Square Invest Limited | Construction | 2020 |
| Town Square Newcastle 1 Ltd | Construction | 2022 |
| Town Square Property Management Ltd | Wholesale & retail | 2016 |
| Town Square Wilmslow 1 Ltd | Construction | 2021 |
| Townley Dyestuffs Limited | Manufacturing | 1992 |
| TPP Compressors Limited | Manufacturing | 2010 |
| TPP Consultancy Limited | Professional & scientific | 2017 |
| TPW Didsbury Limited | Hospitality | 2017 |
| Trachtenhub Limited | Wholesale & retail | 2012 |
| Trade Vapes Limited | Other services | 2023 |
| Tradeeasyuk Ltd | Wholesale & retail | 2016 |
| TRADERSCITY4U Limited | Wholesale & retail | 2018 |
| Traderstikibar Ltd | Hospitality | 2024 |
| Traditional Lakeland Cottages Limited | Real estate | 2000 |
| Tradys Limited | Information & communication | 2025 |
| Trafalgar Court Managed Apartments Limited | Real estate | 2008 |
| Trafalgar Management Apartments Limited | Professional & scientific | 2026 |
| Trafford Concrete Limited | Manufacturing | 2024 |
| Trafford Estates Management Limited | Real estate | 2004 |
| Trafford Fencing Supplies Limited | Manufacturing | 2021 |
| Trafford Health and Care Home Limited | Health & social care | 2026 |
| Trafford Home Care Limited | Public administration | 2025 |
| Trafford Hongkongers CIC | Arts & recreation | 2021 |
| Trafford Living Ltd | Real estate | 2023 |
| Trafford Mobile Valeting Ltd | Wholesale & retail | 2026 |
| Trafford Rubber Holdings Ltd | Financial services | 2022 |
| Trafford School of Yoga CIC | Education | 2026 |
| Trafford Surveyors Limited | Other services | 2006 |
| Trafford Travel Ltd | Other services | 1999 |
| Traffordgas Limited | Construction | 2022 |
| Trailer Auto Group Limited | Manufacturing | 2022 |
| Trans World Radio Limited | Information & communication | 1963 |
| Transafety Limited | Administrative & support | 2015 |
| Transcard Payments Ltd | Professional & scientific | 2023 |
| Transcend Site Services Ltd | Administrative & support | 2025 |
| Transearth Ltd | Wholesale & retail | 2021 |
| Transform IT Partners Ltd | Information & communication | 2025 |
| Transformation and Digital Limited | Information & communication | 2025 |
| Transformation Solutions Ltd | Professional & scientific | 2011 |
| Transformation Triage Ltd | Information & communication | 2025 |
| Transforming Care Limited | Administrative & support | 2013 |
| Transportation Holdings UK Limited | Information & communication | 2018 |
| Trantwood Associates Limited | Households | 2001 |
| Trappa Trans Limited | Transport & logistics | 2022 |
| Travel Ace Ltd | Administrative & support | 2023 |
| Traverse Global Limited | Education | 2025 |
| Trayshaw Limited | Households | 1982 |
| TRB Solutions Ltd | Construction | 2019 |
| Treasure 55 Limited | Administrative & support | 2025 |
| Tredanek Ltd | Professional & scientific | 2022 |
| Treehouse Partnership Limited | Arts & recreation | 2015 |
| Treetops Investments Limited | Real estate | 2017 |
| Trek Diagnostic Systems Limited | Administrative & support | 1986 |
| Trending Travel Ltd | Administrative & support | 2019 |
| Trevco Holdings Global Limited | Wholesale & retail | 2021 |
| Trevena Blake + Associates Limited | Professional & scientific | 2006 |
| TRH Engineering Limited | Construction | 2026 |
| Triangle Educational Services Ltd | Education | 2015 |
| Triangle Global Trading Ltd | Professional & scientific | 2023 |
| Triangular Investments Ltd | Real estate | 2023 |
| Tribal Solutions Limited | Information & communication | 2016 |
| Tribe Mobile Ltd | Information & communication | 2020 |
| Triberg Group Ltd | Professional & scientific | 2022 |
| Trident Financial Planning Limited | Financial services | 2021 |
| Trifle Solutions Ltd | Administrative & support | 2015 |
| Trilateral Investments Limited | Real estate | 2015 |
| Trilby-Reynolds Limited | Real estate | 1966 |
| Trimbco Ventures Ltd | Financial services | 2024 |
| Trinet Care Services Limited | Health & social care | 2025 |
| Trinet Consulting Limited | Administrative & support | 2015 |
| Trinet Investments Limited | Real estate | 2019 |
| Trinetra Consulting Services Limited | Professional & scientific | 2023 |
| Trinitas WM Ltd | Financial services | 2025 |
| Trinity Church (Freehold) Limited | Real estate | 2019 |
| Trinity Church Management Company Limited | Real estate | 2016 |
| Trinity Investments Europe Limited | Real estate | 2023 |
| Trinity Medical Properties Limited | Real estate | 2005 |
| Trinity Mews (Hyde) Management Company Limited | Households | 2005 |
| Trinity Northwest Ltd | Real estate | 2021 |
| Trintuk Limited | Manufacturing | 2023 |
| Trio Healthcare Limited | Manufacturing | 2006 |
| Tripstax Technologies Limited | Wholesale & retail | 2020 |
| Triptych Holdings Limited | Financial services | 2019 |
| Tritee Associates Limited | Health & social care | 2012 |
| Triton Engineering Limited | Professional & scientific | 2023 |
| Tritonjazz Limited | Professional & scientific | 2017 |
| TRO Sports Media Ltd | Other services | 2025 |
| Troy Holidays Ltd | Hospitality | 2024 |
| TRS Quantity Surveying Ltd | Construction | 2017 |